Calculate the energy required to vapourise 50g of water initially at 80oC.[specific heat capacity of…

Calculate the energy required to vapourise 50g of water initially at 80oC.[specific heat capacity of water = 2260Jg-1K-1][specific latent heat of vaporisation of water = 2260Jg-1]
  • A.
    113,000J
  • B.
    117,200J
  • C.
    234,400J
  • D.
    420,000J
Correct Answer: Option B
Explanation

mc(theta) + ML = 50 x 4.2 x 20 + 50 x 2260
= 117,200J

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In the figure shown, PQs is a straight line. What is the value of A. 128o B. 108o…
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